Across
1
Comparison of two quantities
2
Rectangle with four equal sides
4
Space between two intersecting lines
5
Single numeral from 0 to 9
6
Mathematical statement of equality
10
Closed shape with straight sides
11
Sum divided by count
Down
1
Distance from center to edge of circle
2
Exact correspondence on both sides
3
Longest side of a right triangle
7
Middle value in an ordered dataset
8
Number that divides evenly into another
9
Three-sided polygon
12
Value that does not change